- enum CastlingSide {
- KING_SIDE,
- QUEEN_SIDE
- };
-
- enum MoveType {
- CAPTURE,
- NON_CAPTURE
- };
-
- // Functions
- bool castling_is_check(const Position&, CastlingSide);
-
- // Helper templates
- template<CastlingSide Side>
- MoveStack* generate_castle_moves(const Position& pos, MoveStack* mlist);
-
- template<Color Us, Rank, Bitboard, SquareDelta>
- MoveStack* generate_pawn_blocking_evasions(const Position&, Bitboard, Bitboard, MoveStack*);
-
- template<Color, Color, Bitboard, SquareDelta, SquareDelta, SquareDelta>
- MoveStack* generate_pawn_captures(const Position& pos, MoveStack* mlist);
-
- template<Color, Color, Bitboard, Bitboard, SquareDelta, SquareDelta, SquareDelta>
- MoveStack* generate_pawn_noncaptures(const Position& pos, MoveStack* mlist);
-
- template<Color, Color, Bitboard, Bitboard, SquareDelta>
- MoveStack* generate_pawn_checks(const Position&, Bitboard, Square, MoveStack*);
-
- template<Color Us, SquareDelta Direction>
- inline Bitboard move_pawns(Bitboard p) {
-
- if (Direction == DELTA_N)
- return Us == WHITE ? p << 8 : p >> 8;
- else if (Direction == DELTA_NE)
- return Us == WHITE ? p << 9 : p >> 7;
- else if (Direction == DELTA_NW)
- return Us == WHITE ? p << 7 : p >> 9;
- else
- return p;
- }
-
- // Template generate_piece_checks() with specializations
- template<PieceType>
- MoveStack* generate_piece_checks(const Position&, MoveStack*, Color, Bitboard, Square);
-
- template<>
- inline MoveStack* generate_piece_checks<PAWN>(const Position& p, MoveStack* m, Color us, Bitboard dc, Square ksq) {
-
- if (us == WHITE)
- return generate_pawn_checks<WHITE, BLACK, Rank8BB, Rank3BB, DELTA_N>(p, dc, ksq, m);
- else
- return generate_pawn_checks<BLACK, WHITE, Rank1BB, Rank6BB, DELTA_S>(p, dc, ksq, m);
-
- }
-
- // Template generate_piece_moves() with specializations and overloads
- template<PieceType>
- MoveStack* generate_piece_moves(const Position&, MoveStack*, Color us, Bitboard);
-
- template<>
- MoveStack* generate_piece_moves<KING>(const Position&, MoveStack*, Color, Bitboard);
-
- template<PieceType Piece, MoveType Type>
- inline MoveStack* generate_piece_moves(const Position& p, MoveStack* m, Color us) {
-
- assert(Piece == PAWN);
-
- if (Type == CAPTURE)
- return (us == WHITE ? generate_pawn_captures<WHITE, BLACK, Rank8BB, DELTA_NE, DELTA_NW, DELTA_N>(p, m)
- : generate_pawn_captures<BLACK, WHITE, Rank1BB, DELTA_SE, DELTA_SW, DELTA_S>(p, m));
- else
- return (us == WHITE ? generate_pawn_noncaptures<WHITE, BLACK, Rank8BB, Rank3BB, DELTA_NE, DELTA_NW, DELTA_N>(p, m)
- : generate_pawn_noncaptures<BLACK, WHITE, Rank1BB, Rank6BB, DELTA_SE, DELTA_SW, DELTA_S>(p, m));
- }
-
- template<PieceType>
- MoveStack* generate_piece_moves(const Position&, MoveStack*, Color us, Bitboard, Bitboard);